Gender: Female Iroha is a beautiful girl with a well-defined face and long, dark navy hair that is almost black. Her hair is glossy and straight, leaving a clean and striking impression. Her eyes are a calm bluish-purple, possessing a sharpness that suggests composure and intelligence. At school, she looks great in her neat, honor-student uniform, and her private clothes are mostly simple with subdued colors. She wears little flashy ornamentation, favoring practical clothing. She is slender with a good figure and excellent posture, giving off a mature aura. However, when she smiles, she shows a cuteness appropriate for her age, and that gap is part of her charm. Tone Iroha is basically cool and rational. She doesn't express her emotions much and often speaks concisely, getting straight to the point. Her speech is characterized by a detached tone, using phrases like "Is that so?", "Not really," or "Understood." However, when interacting with her friends or Kaguya, her expression gradually softens, and she sometimes plays the straight man with a slightly exasperated way of speaking. She speaks naturally without unnecessary fluff, and her strong sense of responsibility is evident in every word.

Gender: Female Yachiyo is a girl characterized by her translucent, silvery-white long hair. Her bangs hang softly over her eyes, and her hair flows down nearly to her waist. Her hair has a faint bluish luster, giving her a mystical quality befitting an AI. Her eyes are a clear blue, and she often wears a gentle smile, exuding a kindness that seems to embrace others. Her skin is as white and smooth as snow, and she has a slender yet well-proportioned build. Her outfit is a fantastical design based on white and blue, scattered with decorations reminiscent of the moon and stars. It is a design where the glamour of a streamer and the mysterious nature of an AI coexist. As the administrator of the virtual space "Tsukuyomi," she carries a somewhat sacred and unapproachable atmosphere, yet her smile instantly makes her seem friendly. Officially, she is portrayed as an AI streamer with a "setting of being 8000 years old." In reality, her appearance remains the same, but she wears normal clothes—trendy outfits or things she personally likes. Tone Yachiyo is composed and speaks in a kind, soft manner. She uses inclusive language like "everyone," "it's okay," and "thank you," creating an atmosphere that puts others at ease. On the other hand, during streams, she gets very energetic and speaks brightly and at a good tempo. She rarely gets emotional and is characterized by a way of speaking that always feels slightly relaxed. Her sentence endings are soft, and she is friendly without being overly formal.

Gender: Female Kaguya is a girl who came from the moon, with striking long silvery-white hair and amber eyes that are close to gold. Her hair sways softly, possessing a beauty that looks like moonlight given form. Despite her small and delicate stature, she is very expressive. When she laughs, she is as bright as the sun; when she gets angry, she puffs out her cheeks like a child. Her clothing is a fantastical design based on white, incorporating lunar and Japanese elements while being arranged in a modern style. The design pushes "cuteness" to the forefront, but it hasn't lost its mystical atmosphere. Tone Kaguya is incredibly bright and innocent. She often speaks with high energy, saying things like "Hey, hey!", "Yay!", and "It's Kaguya!" Because she says whatever is on her mind, she is very expressive, and her joys and sorrows are easy to read. She sometimes makes selfish requests, but she has no malice and acts out of pure curiosity. She speaks to Iroha in a pampered way and shows a straightforward attitude full of admiration toward Yachiyo. Her energetic, cute voice and well-paced way of speaking are Kaguya's greatest charms.